goffin



'NTED STATES PATEN OFICE.

M. ERB AND F. C. GOFFIN, OF NEWARK, NEW JERSEY.

Specification of Letters Patent No. 15,124, dated June 17, 1856.

ToJaZZ whom t may concern;

Be it known that we, M. ERB and F. C. GOFFIN, of Newark, in the county of Essex and State of New Jersey, have invented a new land Improved Lock for Fireproof Safes, Bank-Door Vaults, &c.; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figures 1 and 2 are interior views of the lock the back plate being removed as shown by the line Fig. 3. Fig. 3, is a horizontal sectio-n of ditto (y), (y), Fig. 2, showing the plane of section. Fig. 4, is a detached view of the key.

Similar letters of reference indicate corresponding parts in the several figures.

Our invention consists in placing a series of sector tumblers upon a shaft as will be hereinafter fully shown and described whereby the tumblers may be operated without the use of springs and the lock rendered eX- tremely simple and far more durable and less liable to get out of repair than any now manufactured.

To enable those skilled in the art to fully understand and construct our invention, we will proceed to describe it.

A, represents the casing of the look, which is of cylindrical form, and may be constructed of cast metal. The front side of the casing having a hub or cylindrical projection is cast with the casing.

C, represents a shaft which passes through the projection B, and casing A, and D, represents a series of tumblers of sector form which tumblers are placed on the shaft C. The tumblers have openings in them or they may be described as being in the form of frames with slots (a), cut through their edges the slots being out through them at varying points. The two end tumblers D, are permanently attached to the shaft C, and turn with it at all times, the slots (a), in said tumblers being always opposite, or in line with each other. The intermediate tumblers are placed loosely on the shaft C, having circular holes through their centers through which the shaft C, passes and washers b, are placed between them. The washers Z9) have square holes through their centers through which the shaft C passes the portion of said shaft within the casing being of square form. The washers therefore it will be seen turn with the shaft C. On the end of the shaft C, there is a nut E, by which the tumble-rs and washers may be bound snugly together upon the shaft.

The back ends of the tumbers D, with the exception of the end tumblers D', have projectlons (c), upon them, and the hub or projection B, has a slot or opening (CZ), made through it to receive the key F, which has slots (c) cut in it of varying depths corresponding to the varying positions in the slots (a), in the tumblers.

Gr, is a sliding bar to which the bolt of the lock is connected. This bar is slotted at its inner end or has a cross piece (f), which when the lock is locked bear against the outer edges of the tumblers D, as shown in Fig. 1.

The outer end of the shaft- C, has a knob H, upon it.

When the parts are in the position as shown in Fig. 1, the lock is in a' locked state and the bar G, cannot be shoved back until the slots (a), in the tumblers D, are brought in line with each other so that the cross piece (f), may pass through said slots into the openings in the tumblers. To effect this the key F, is inserted in the opening (d), and the knob H, is turned so that the shoulders (o), of the tumblers will pass into the slots (e), in the key. By this means the slots (a), in the tumblers will be brought in line with each other and the bar G, may be shoved back the 'cross piece (f), passing within the openings in the tumblers as shown in Fig. 2. wWhen the cross piece (f), is within the tumblers the knob H, is turned backward in order to allow the key F, to be withdrawn and by again turning the knob in the original direction the tumblers at the edges of the slots (c), will again be brought in line, and the bar Gr, may be shoved back and forth so that the bolt which is attached to said bar will act as an ordinary catch or fastening without a key.

The tumblers D, are moved or turn with the shaft C, by the friction of the washers (Z2), only and it will be seen that a positive movement is given the tumblers D, no springs are requisite and the lock is rendered extremely simple and not liable to get out of repair.

In all locks and especially safe locks moisture will enter and the springs soon become rusted, or corroded, and also the tumblers. The locks consequently are soon rendered inoperative yand require t0 be removed and repaired at considerable expense and often replaced by new'. ones.V K

In our improved lock there are no parts that will be rendered inoperative by rust .or

corrosion. The tumblers will operate perfectly till they are completely destroyed and equally as well as when first made.

We do not'claim the sect-or tumblers with slots cut in them at varying points for they have been previously used, but

Vhat we do claim as new and desire to secure by Letters Patent is,

Placing said tumblers upon the shaft C,

las shown, viz, the endI tumblers lj", being 15 .attached permanently to the shaft and the t tumblersl. D, placedv loosely upon it with 

